Jokeblocking, an act usually carried out by a jokeblocker, is the gesture of deliberately ruining someone's attempt to tell a joke or cause others to laugh, either by distraction or dismissal. Not to be mistaken for cockblocking
Danny: Hey, listen to this joke! "Knock, kno-"
George: Dude that was funnythree fucking years ago.
Danny: Damn, stop jokeblocking me.
When you want to go jogging, but there are either too many people on the track already, or a sporting event like a football game or track meet, so you can't go jogging.